<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>

<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>

<body>
    <!--准备好一个"容器"-->

    <div id="test"></div>

    <!--引入库-->
    <script type="text/javascript" src="../js/react.development.js"></script>
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <script type="text/javascript" src="../js/babel.min.js"></script>


    <script type="text/babel">
        class Life extends React.Component {


            state={
                opacity:1
            }

            hide = () => {
                ReactDOM.unmountComponentAtNode(document.getElementById('test'));
            }

            //组件挂载完毕
            componentDidMount(){
                this.timer= setInterval(() => {
                    console.log("@");
                    let {opacity} = this.state;
                    opacity -= 0.1;
                    if(opacity<=0) opacity=1;
                    this.setState({opacity:opacity});
                }, 200);
            }

            //组件将要卸载
            componentWillUnmount(){
                clearInterval(this.timer);
            }

            //初始化渲染、状态更新之后
            render() {
                return (
                    <div>
                        <h2 style={{opacity:this.state.opacity}}>煙々羅</h2>
                        <button onClick={this.hide}>烟烟罗</button>
                    </div>
                );
            }
        }
        //2.渲染虚拟DOM到页面
        ReactDOM.render(<Life/>, document.getElementById('test'));
    </script>

</body>

</html>